Sialic acids are important recognition sites in protein- and lipid-linked glycans of higher organisms and of select bacteria and protozoa. They are also prominent in human milk oligosaccharides. Defined sialo-oligosaccharides have interesting applications in chemical glycobiology and represent emerging ingredients for health-related nutrition. The growing demand for sialo-oligosaccharides has promoted developments in multidisciplinary carbohydrate synthesis, with approaches by cascade bio-catalysis having a leading role. The key synthetic step involves catalysis by sialyltransferases (EC 2.4.99.-) and consists in attaching sialic acid from a cytidine 5'-monophosphate-activated donor (CMP-sialic acid) to the nascent oligosaccharide acceptor. Sialyltransferases from bacteria, in general, show convenient properties for application (e.g., relative ease of recombinant production; high specific activity and operational stability). Here, we review salient characteristics of the bacterial sialyltransferases active on D-galactose- and N-acetyl-D-galactosamine-containing acceptors and highlight advances of their development into efficient biocatalysts. We also show integration of these sialyltransferases into multistep enzymatic cascades for sialo-oligosaccharide (e.g., sialyllactose) production from expedient substrates, using in situ formation of the CMP-sialic acid donor. We summarize functional parameters of the enzymes for CMP-sialic acid supply and analyze multi-enzymatic synthesis of sialo-oligosaccharides from a reaction engineering point of view. We discuss opportunities of sialyltransferase cascades for efficient sialo-oligosaccharide production in vitro and in vivo.
Bacterial sialyltransferases and their use in biocatalytic cascades for sialo-oligosaccharide production.
Sabine Schelch,Chao Zhong,Barbara Petschacher,B. Nidetzky
Published 2020 in Biotechnology Advances
ABSTRACT
PUBLICATION RECORD
- Publication year
2020
- Venue
Biotechnology Advances
- Publication date
2020-08-18
- Fields of study
Biology, Medicine, Chemistry
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
- No claims are published for this paper.
CONCEPTS
- No concepts are published for this paper.
REFERENCES
CITED BY
Showing 1-31 of 31 citing papers · Page 1 of 1